F04B 9/00

Piston machines or pumps characterised by the driving or driven means to

Official title: Piston machines or pumps characterised by the driving or driven means to or from their working members

F04B9/00 (Piston machines or pumps characterised by the driving or driven means to) appears on 2,903 US grants and 2,582 published applications in this corpus.

Search patents in F04B

Granted patents: 2,903
Published applications: 2,582
Assignees: 1,558
Inventors: 5,082
Latest grant: 6 Oct 2026

Filings by year

F04B 9/00: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	67	0
1977	57	0
1978	58	0
1979	28	0
1980	24	0
1981	21	0
1982	23	0
1983	33	0
1984	33	0
1985	32	0
1986	15	0
1987	24	0
1988	35	0
1989	22	0
1990	22	0
1991	37	0
1992	47	0
1993	50	0
1994	35	0
1995	40	0
1996	60	0
1997	48	0
1998	38	0
1999	47	0
2000	53	0
2001	49	10
2002	42	35
2003	37	36
2004	33	54
2005	23	59
2006	21	51
2007	31	46
2008	31	66
2009	20	64
2010	28	60
2011	51	54
2012	41	80
2013	60	99
2014	50	113
2015	78	145
2016	78	143
2017	96	176
2018	138	181
2019	179	166
2020	142	146
2021	132	182
2022	132	147
2023	127	137
2024	118	146
2025	122	114
2026	95	72

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Piston machines or pumps characterised by the driving or driven means to

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